According to newfound documents, it is heavily implied that Casper was actually the main character from another show The Playfellow Workshop was developing at the same time as Welcome Home, however, their show was canceled after audiences' disinterest for the pilot episode. Ronald Dorelaine, creator of Welcome Home, bought the creative rights to Casper and after a redesign, they were introduced into the show as a sort of antagonist.

Casper's apparisions in the show were few and far between, but they always circled around teasing comments on other characters' faults or challenging the neighbors to dangerous games, sometimes even starting fights amongst them with petty gossip, which Wally always had to put an end to. Book illustrations also show Casper awake at night outside when all the other neighbours had already gone to sleep.

Their live-hand puppet included an articulated tail, held together by a spring which was always in frame whenever Casper appeared and always moving. Casper's segments in the show included real-life recorded footage of domestic cats accompanied by narrated fun facts and curiosities about them.